Accident occurred Tuesday, November 03, 2015 in Lahore, Pakistan
Aircraft: BOEING 737, registration:
Injuries: 121 Uninjured.
The foreign authority was the source of this information.
The Civil Aviation Authority (CAA) of Pakistan has notified the NTSB of an accident involving a Boeing 737-400, registration AP-BJO, which occurred on November 3, 2015. The NTSB has appointed a U.S. Accredited Representative to assist the CAA investigation under the provisions of ICAO Annex 13 as the State of Manufacture and Design of the airplane.
All investigative information will be released by the CAA.
Synopsis
The accident was reported to Safety Investigation Board (SIB), Pakistan by the Area Control Centre, Allama Iqbal International Airport (AIIAP), Lahore through telex and was notified in accordance with ICAO Annex-13 by SIB. Accredited Representative (ACCREP) was appointed by United States of America (state of manufacture & design). Director General Civil Aviation Authority (DG CAA), Pakistan issued Memorandum vide letter No. HQCAA/1901/374/SIB/658 dated 10th November, 2015 authorizing SIB to investigate the accident. President SIB along with Ops and Technical members of the inquiry team proceeded to the accident site on 03rd November, 2015 and collected all necessary evidence. The Captain and First Officer (FO) of the flight were sent for medical evaluation by Airport Manager, CAA, AIIAP, Lahore.
After touchdown, both main landing gears broke one after the other. Subsequently, the aircraft departed runway while resting on both engines and stopped 8302 ft from Runway Threshold (RWT), 197 ft left of runway centreline.
Cockpit crew landing the aircraft through unstabilized approach (high ground speed and incorrect flight path), low sink rate of left main landing gear (LMLG) and probable presence of (more than the specified limits) play in the linkages of shimmy damper mechanism lead to torsional vibrations / breakage of shimmy damper after touchdown. The resultant torsional excitation experienced by the LMLG due to free pivoting of wheels (along vertical axis) caused collapse of LMLG. The right main landing gear (RMLG) collapsed due departure of aircraft from the prepared surface of the runway towards unprepared surface (left side).
FACTUAL INFORMATION
History of the Flight. On 03rd November 2015, M/s Shaheen Air International Flight NL-142, Boeing 737-400 aircraft Reg # AP-BJO, was on a scheduled passenger flight from Karachi to Lahore. The flight landed on Runway 36L as Runway 36R was not available due to ILS CAT-III up-gradation. After touchdown, both main landing gears broke one after the other. Subsequently, the aircraft departed runway while resting on both engines and stopped 8302 ft from Runway Threshold (RWT), 197 ft left of runway centreline. The nose landing gear, however, remained intact. All the passengers were safely evacuated through emergency procedure.
Injuries to Persons. No one from flight crew members or passengers was hurt during the accident. Few passengers received minor bruises during emergency evacuation through door slides and were treated by medical staff.
Damage to Aircraft. The fuselage of the aircraft remained intact. Both main landing gears got dislodged from the aircraft. The wing structure adjacent to the main landing gear attachment points was extensively damaged. Both engines sustained extensive damage because of dragging after landing gears collapse. The fuselage sustained damaged at right side in the tail section. The seats adjacent to the fuselage damage location were not occupied; therefore, there were no injuries.
The accident was reported to Safety Investigation Board (SIB), Pakistan by the Area Control Centre, Allama Iqbal International Airport (AIIAP), Lahore through telex and was notified in accordance with ICAO Annex-13 by SIB. Accredited Representative (ACCREP) was appointed by United States of America (state of manufacture & design). Director General Civil Aviation Authority (DG CAA), Pakistan issued Memorandum vide letter No. HQCAA/1901/374/SIB/658 dated 10th November, 2015 authorizing SIB to investigate the accident. President SIB along with Ops and Technical members of the inquiry team proceeded to the accident site on 03rd November, 2015 and collected all necessary evidence. The Captain and First Officer (FO) of the flight were sent for medical evaluation by Airport Manager, CAA, AIIAP, Lahore.
After touchdown, both main landing gears broke one after the other. Subsequently, the aircraft departed runway while resting on both engines and stopped 8302 ft from Runway Threshold (RWT), 197 ft left of runway centreline.
Cockpit crew landing the aircraft through unstabilized approach (high ground speed and incorrect flight path), low sink rate of left main landing gear (LMLG) and probable presence of (more than the specified limits) play in the linkages of shimmy damper mechanism lead to torsional vibrations / breakage of shimmy damper after touchdown. The resultant torsional excitation experienced by the LMLG due to free pivoting of wheels (along vertical axis) caused collapse of LMLG. The right main landing gear (RMLG) collapsed due departure of aircraft from the prepared surface of the runway towards unprepared surface (left side).
FACTUAL INFORMATION
History of the Flight. On 03rd November 2015, M/s Shaheen Air International Flight NL-142, Boeing 737-400 aircraft Reg # AP-BJO, was on a scheduled passenger flight from Karachi to Lahore. The flight landed on Runway 36L as Runway 36R was not available due to ILS CAT-III up-gradation. After touchdown, both main landing gears broke one after the other. Subsequently, the aircraft departed runway while resting on both engines and stopped 8302 ft from Runway Threshold (RWT), 197 ft left of runway centreline. The nose landing gear, however, remained intact. All the passengers were safely evacuated through emergency procedure.
Injuries to Persons. No one from flight crew members or passengers was hurt during the accident. Few passengers received minor bruises during emergency evacuation through door slides and were treated by medical staff.
Damage to Aircraft. The fuselage of the aircraft remained intact. Both main landing gears got dislodged from the aircraft. The wing structure adjacent to the main landing gear attachment points was extensively damaged. Both engines sustained extensive damage because of dragging after landing gears collapse. The fuselage sustained damaged at right side in the tail section. The seats adjacent to the fuselage damage location were not occupied; therefore, there were no injuries.
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